Question

Riley is 3 years older than his sister. Which of the following expressions shows the sum of their ages if s represents Riley's sister's age?

Answer 1

3s


s + 3


2(s + 3)


2s + 3

Answer 2

ok, so if riley is 3 years older than his sister

we can represent his age as s + 3

does that make sense so far?

Answer 3

yes

Answer 4

so if we add s + s + 3

which answer choice best matches this?

Answer 5

2s +3

Answer 6

yes good